#include<bits/stdc++.h>
#define ll long long
#define int ll
#define L x<<1
#define R L|1
#define mid (l+r>>1)
#define lc L,l,mid
#define rc R,mid+1,r
#define OK Ll<=l&&r<=Rr
#define Root 1,1,n-1
#define rep(x,y,z) for(int x=(y);x<=(z);x++)
#define per(x,y,z) for(int x=(y);x>=(z);x--)
#define repn(x) rep(x,1,n)
#define repm(x) rep(x,1,m)
#define pb push_back
#define e(x) for(int i=h[x],y=to[i];i;i=nxt[i],y=to[i])
#define E(x) for(auto y:p[x])
#define Pi pair<ll,ll>
#define ui unsigned ll
inline int read(){int s=0,w=1;char c=getchar();while(c<48||c>57) {if(c=='-') w=-1;c=getchar();}while(c>=48&&c<=57)s=(s<<1)+(s<<3)+c-48,c=getchar();return s*w;}
inline void pf(int x){if(x<0) putchar('-'),x=-x;if(x>9)pf(x/10);putchar(x%10+48);}
using namespace std;
const int N=2e5+5,M=1.1e6+5,inf=(1LL<<31)-1,mod=998244353;
const ll llf=1e18;
inline void add(int &a,int b){((a+=b)>=mod) and (a-=mod);}
inline int Add(int a,int b){return add(a,b),a;}
inline int mul(int a,int b){return 1LL*a*b%mod;}
inline void Mul(int &a,int b){a=mul(a,b);}
inline void red(int &a,int b){add(a,mod-b);}
inline int Red(int a,int b){return red(a,b),a;}
inline int qp(int a,int b){if(!b)return 1;int c=qp(a,b>>1);Mul(c,c);if(b&1)Mul(c,a);return c;}
inline int INV(int x){return qp(x,mod-2);}
int n,h[N],to[N<<1],nxt[N<<1],cnt,a[N],deg[N];
inline void add_(int a,int b){
	to[++cnt]=b,nxt[cnt]=h[a],h[a]=cnt,deg[a]++;
}
inline void clear(){
	repn(i)h[i]=deg[i]=0;cnt=0;
}
int res[N];
bool fl;
inline void dfs(int x,int fa){
	res[x]=0;
	if(deg[x]==1)res[x]=a[x];
	else {
		int Mx=0;
		e(x)if(y^fa)dfs(y,x),res[x]+=res[y],Mx=max(Mx,res[y]);
		if(!fl)return;
		int Mst=res[x]/2;
		if(Mx>res[x]-Mx)Mst=res[x]-Mx;
		if(res[x]<a[x])return fl=0,void();
		int del=res[x]-a[x];
		if(del>Mst)return fl=0,void();
		res[x]-=del*2;
	}
}
inline void Main(){
	n=read();
	repn(i)a[i]=read();
	rep(i,2,n){
		int x=read(),y=read();
		add_(x,y),add_(y,x);
	}
	if(n==1)return puts(a[1]?"NO":"YES"),void();
	if(n==2)return puts(a[1]==a[2]?"YES":"NO"),clear(),void();
	repn(i)if(deg[i]>1)return fl=1,dfs(i,0),puts((!res[i]&&fl)?"YES":"NO"),clear(),void();
}
signed main(){
	freopen("clean.in","r",stdin);
	freopen("clean.out","w",stdout);
	int T=read();
	while(T--)Main();
	return 0;
}	